OK, with that title, I know I've already stepped in it, but I want your help answering something that has bugged me for a long time.

Do the garnets actually exist in coticule slurry???

This claim has been made for a long time. Ardennes describes it this way:

When using these whetstone the crystals are released from the stone itself and produce together with water a very “abrasive milk”. In crystal form the Garnet is round or slightly oval and resembles a football (5-20 micron), made up of tiny facets (Rhomboid). These facets create obtuse angles to each other, and it is these corners which are in contact with the metal to be sharpened. These attributes are why the stone sharpens so quickly and delicately.

I've never been able to see those intact crystals. All I have ever been able to find are crescent shaped shards along with fragments of various random shapes, but nothing resembling what has been attributed to coticule slurry.

So, does anyone know of a photograph of coticule slurry that shows intact garnets?